Ayanava HG presentation 13 april 2010

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This presentation was delivered on 13 April 2010 to the Home Grounds team of Alabama Cooperative Extension

This presentation was delivered on 13 April 2010 to the Home Grounds team of Alabama Cooperative Extension

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  • 1. Pointers for Insect Control in Garden Vegetables
    Dr. Ayanava Majumdar
    Ext. Entomologist, State SARE Coordinator
    Tel: (251) 331-8416
  • 2. Start with a Clean Garden
    Remove plant debris
    Bring weeds under control quickly
    Choose vigorous hybrids
    Choose good crop rotation (especially think disease carryover)
  • 3. Insect monitoring with traps
    Pheromone traps are sold as kits by many companies (Planet Natural, Arbico Organics) and effective in detecting low insect populations.
    Shown here are two low-cost wing traps that can be used for monitoring corn earworm & tobacco budworm in the backyard.
  • 4. ACES Insect monitoring project
    (started in 2009)
    • What does trap catch tell you?
    Catch = Density x Activity
    • Commercial traps/lures were used
    • 5. Advantages of IPM traps: Specificity, Sensitivity, Simplicity, Safety
    Sites monitored for pest insects in 2009 commercial crops are marked with a star >>
  • 6. Trap catches in 2009
    Insect catches (June-Oct.):
    Total = 8,586
    Lesser cornstalk borer = 3,586
    Fall armyworm = 1,386
    Beet armyworm = 1,377
    Corn earworm = 589
    Southern armyworm = 393
    Tobacco budworm = 342
    Soybean looper = 230
    Cabbage looper = 223
    Corn rootworm: Southern = 253; Western = 13
    Black cutworm = 125
    Diamondback moth = 65
    Tomato pinworm = 4
    European corn borer = 0
    Stink bugs = 0 (trap/lure problem)
    Expect these insects in your backyard too 
  • 7. Insect monitoring with pit-fall traps
    Estimate insect activity on soil surface. Insects follow the guide sticks and drop into the trap (a ½ cup of water).
    Guide stick
  • 8. Light trapping insects: The quick & easy way
    Water-filled bowl under porch light can be a simple light trap in summer. Add some dish detergent to the water to drown moths and beetles that will be attracted to the light. During rain, remember to remove the container. Keep records of your collection.
  • 9. IF you do insect trapping…
    Maintain a record of start and finish each year
    Record number of insects in trap each week
    Draw chart of insect numbers and note the peak flight period (see next slide for example)
    Scout your main crop for larvae/crop damage
    Correlate the insect number in trap to actual crop damage
    Do these steps in multiple years and you will become a true entomologist!
    Be able to predict a pest outbreak using population data
  • 10. Example of insect monitoring using pheromone trap:
    Corn earworm/tomato fruitworm
    Population density in Mobile & Baldwin Co.
    Monthly average activity
    Arrows (above) indicate peak activity periods.
    Year 2009
  • 11. Try different IPM tactics
    Deep tillage, soil solarization…can expose and kill insects.
    Trap crops (squash, sunflower) for sucking pests + contact poison
    Trap crop (squash)
    Main crop
    Main crop
    Main crop
    (watermelon, cantaloupe, cucumber)
  • 12. Try different IPM tactics
    Physical barriers to insects:
    • Reflective mulch (white, silvery)…when plants are small
    • 13. Row covers for insect control (light weight material)
    • 14. Insect nets from fine cotton material (sold in Walmart)
    • 15. Plant collars to repel soil insects
    Use insecticides after proper identification & as a last resort…
  • 16. Selecting Pesticides for Home Gardens: It is a Jungle out there!
    Insecticides displayed by bottle size, not the Active Ingredient (AI)
  • 17. Who doesn’t love Malathion?
    • Spidermites, aphids, stink bugs
    • 18. At least 7 companies make formulations
    • 19. Read label before use in vegetables
  • Friend of friends – Bacillus thuringiensis(Bt)
    • Caterpillars in cool-season crops, tomatoes, pepper
    • 20. Frequent appl., thorough coverage needed
    • 21. 0 Pre Harvest Interval (PHI)
  • Pyrethrin on Vegetables
    Has sulfur, can burn leaves
    • Broad-spectrum
    • 22. RTU on select vegetables
  • Green Light Organic Products
    (armyworm, loopers, cutworm, aphids, psyllids)
    Neem (oil)
    Neem II (oil + pyrethrin)
  • 23. Insect control granules in vegetables
    • Contact & stomach poison
    • 24. Back of the bag has broad vegetable label for ants, armyworms, grubs, etc.
    • 25. Long residual
    Bifenthrin (AI) granules: can be applied once when preparing soil or after planting (mix well in soil). Bifenthrin spray or RTU can be applied multiple times 7 days apart. Try rotatin Sevin or BugBGon with alternative insecticides.
  • 26. Bayer’s line-up of products…
    • Systemic poison
    • 27. Apply at first sign of insects (aphid, thrips, WF, beetles)
    • 28. Best as PoE drench
    Product on rebate on BayerAdvanced.com!
    Bayer Advanced FCV
  • 29. Spinosad…a good rotation partner
    • Excellent for thrips, leafminers, looper, DBM, CPB, control
    • 30. 1 day PHI
  • Toxicity of formulations
    Source: Penn State Univ. IPM Program
  • 31. For downloading a quick chart on insecticides for home gardens, please visithttps://sites.aces.edu/group/commhort/vegetable/vegfactsheets/default.aspx